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DiracPool
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In referring to the recent results of the AMS experiment in the ISS:
http://physics.aps.org/articles/v6/40
I'm still left wanting of understanding why the presence of an excess of positrons infiltrating the device isometrically indicates a presence of dark matter and tells me something about it.
What I'm getting is that this positron excess is supposed to be reflective of annihilation events in the dark matter. From the article:
But if we don't know what dark matter is, how can we say that annihilation events would produce excess positrons, or positrons at all? I don't know if I'm feeling my 2 billions dollars working for me here. Can someone enlighten me?
http://physics.aps.org/articles/v6/40
I'm still left wanting of understanding why the presence of an excess of positrons infiltrating the device isometrically indicates a presence of dark matter and tells me something about it.
What I'm getting is that this positron excess is supposed to be reflective of annihilation events in the dark matter. From the article:
But a more exciting possibility is that the positrons come from the annihilation of dark matter particles, which may populate the Milky Way and its halo [6]. Dark matter is, after all, a dominant form of the matter-energy budget of the Universe, but we don’t know its particle nature or how it interacts with itself and with normal matter (other than through gravitational interactions
But if we don't know what dark matter is, how can we say that annihilation events would produce excess positrons, or positrons at all? I don't know if I'm feeling my 2 billions dollars working for me here. Can someone enlighten me?